Grass trimmer head



FIG. 1 shows a front perspective view of the grass trimmer head;

FIG. 2 shows a bottom plan view of the grass trimmer head;

FIG. 3 shows a top plan view of the grass trimmer head;

FIG. 4 shows a front elevation of the grass trimmer head;

FIG. 5 shows a rear elevation of the grass trimmer head; and,

FIG. 6 shows a top perspective view of the grass trimmer head. 

The ornamental design for a grass trimmer head, as shown and described. 